From ba80acb0dfca87e6a6257932414350da85dde48f Mon Sep 17 00:00:00 2001 From: Cristian Marussi Date: Wed, 18 Jan 2023 12:14:23 +0000 Subject: firmware: arm_scmi: Reject SCMI drivers when configured in raw mode Reject SCMI driver registration when SCMI raw mode support is configured, so as to avoid interferences between the SCMI raw mode transactions and the normal SCMI stack operations. Signed-off-by: Cristian Marussi Tested-by: Florian Fainelli Tested-by: Vincent Guittot Link: https://lore.kernel.org/r/20230118121426.492864-15-cristian.marussi@arm.com Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/bus.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/firmware/arm_scmi/bus.c') diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c index 6228f1581fe3..8601d75f5b9b 100644 --- a/drivers/firmware/arm_scmi/bus.c +++ b/drivers/firmware/arm_scmi/bus.c @@ -59,6 +59,12 @@ static int scmi_protocol_device_request(const struct scmi_device_id *id_table) pr_debug("Requesting SCMI device (%s) for protocol %x\n", id_table->name, id_table->protocol_id); + if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT)) { + pr_warn("SCMI Raw mode active. Rejecting '%s'/0x%02X\n", + id_table->name, id_table->protocol_id); + return -EINVAL; + } + /* * Search for the matching protocol rdev list and then search * of any existent equally named device...fails if any duplicate found. -- cgit v1.2.3